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To accomplish rapidly the micro-aerobic granulation process of digestion sludge for the treatment of actual coking wastewater and meanwhile achieve high COD, the EGSB reactor was employed with two operation stages. Stage I: Granular sludge was formed from digestion sludge using brewery wastewater as substrate in the anaerobic way (meanwhile adding little granules, which were 1/7 of the total biomass)...
To obtain the rapid startup and stable operation of the micro-aerobic EGSB reactor for simultaneous removal of COD and NH3-N treating actual coking wastewater at 25-30°C, the EGSB were operated for approximately 5 months (consist of startup stage and stable operation stage) for the researching of the forming of micro-aerobic granules and the simultaneous removal of the COD and NH3-N at 25-30°C. By...
To obtain the rapid startup of EGSB reactor seeded with anaerobic digestion sludge for the treatment of actual domestic wastewater under ambient temperature, two startup methods i.e. A and B were tried out at 25°C. For method A, reactor A (RA) was fed with brewery wastewater to incubate granular sludge and then treated domestic sewage, for method B, reactor B (RB) was fed with sanitary waste directly...
To assess the feasibility of actual domestic wastewater treatment by an expanded granular sludge bed (EGSB) reactor at ambient temperature, the startup and stable operation performance of an EGSB reactor seeded with digestion sludge treating actual domestic wastewater was monitored in the range of 13~25degC. The results showed that there was no adaptive stage to treat actual domestic wastewater using...
Chemical precipitation with alum was employed as the post-treatment of a micro-aerobic EGSB system treating domestic wastewater to reduce TP concentration. Effectiveness evaluation focused on the influences of reaction/settling time, pH, coagulant dosage and temperature when original TP ranged in 2-8 mg/L. It was found that 20 min was appropriate for flocculation or sedimentation. Samples with original...
An expanded granular sludge bed (EGSB) reactor was employed to promote COD removal from domestic wastewater in psychrophilic range (13-26degC). Reactor performance and sludge properties were investigated. It was found that COD removal increased with the increase of organic loading rate (OLR) and the shortening of HRT. At temperature above 15degC, the average COD removal were 75, 81, 81 and 82% with...
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